Biochemical Engineering - Water Treatment

Exercise :: Water Treatment - Section 1

  • Water Treatment - Section 1
21. 

Which of the following substances are commonly used in a filter?

A. Charcoal
B. Sand
C. Both (a) and (b)
D. Aluminum chloride

Answer: Option C

Explanation:

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22. 

Biological oxidation processes usually referred as biological treatment, are the most common form of

A. primary treatment
B. secondary treatment
C. tertiary treatment
D. all of these

Answer: Option B

Explanation:

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23. 

The maximum permissible limit (BIS) of turbidity in drinking water is

A. 5 NTU
B. 10 NTU
C. 15 NTU
D. 20 NTU

Answer: Option B

Explanation:

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24. 

Sedimentation is a physical process used in wastewater treatment to

A. remove particles that are less dense than water
B. remove particles that are more dense than water
C. remove the pertinacious material from the water
D. none of the above

Answer: Option B

Explanation:

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25. 

The ultimate source of water is

A. rivers and lakes
B. dew and forest
C. rain and snow
D. underground and surface

Answer: Option C

Explanation:

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